zephyr: add architecture support

examples/TCP/EthernetModbusServerLED/EthernetModbusServerLED.ino

@@ -14,6 +14,9 @@
 
 #include <SPI.h>
 #include <Ethernet.h>
+#if defined(ARDUINO_ARCH_ZEPHYR)
+#include <ZephyrServer.h>
+#endif
 
 #include <ArduinoRS485.h> // ArduinoModbus depends on the ArduinoRS485 library
 #include <ArduinoModbus.h>
@@ -26,7 +29,11 @@ byte mac[] = {
 };
 IPAddress ip(192, 168, 1, 177);
 
+#if defined(ARDUINO_ARCH_ZEPHYR)
+ZephyrServer ethServer(502);
+#else
 EthernetServer ethServer(502);
+#endif
 
 ModbusTCPServer modbusTCPServer;
 
@@ -81,8 +88,12 @@ void setup() {
 
 void loop() {
   // listen for incoming clients
+#if defined(ARDUINO_ARCH_ZEPHYR)
+  EthernetClient client = ethServer.accept();
+#else
   EthernetClient client = ethServer.available();
-
+#endif
+
   if (client) {
     // a new client connected
     Serial.println("new client");

examples/TCP/WiFiModbusClientToggle/WiFiModbusClientToggle.ino

@@ -12,8 +12,12 @@
 */
 
 #include <SPI.h>
+#if defined(ARDUINO_ARCH_ZEPHYR)
+#include <WiFi.h>
+#else
 #include <WiFiNINA.h> // for MKR WiFi 1010
 // #include <WiFi101.h> // for MKR1000
+#endif
 
 #include <ArduinoRS485.h> // ArduinoModbus depends on the ArduinoRS485 library
 #include <ArduinoModbus.h>

examples/TCP/WiFiModbusServerLED/WiFiModbusServerLED.ino

@@ -12,8 +12,13 @@
 */
 
 #include <SPI.h>
+#if defined(ARDUINO_ARCH_ZEPHYR)
+#include <WiFi.h>
+#include <ZephyrServer.h>
+#else
 #include <WiFiNINA.h> // for MKR WiFi 1010
 // #include <WiFi101.h> // for MKR1000
+#endif
 
 #include <ArduinoRS485.h> // ArduinoModbus depends on the ArduinoRS485 library
 #include <ArduinoModbus.h>
@@ -28,7 +33,11 @@ const int ledPin = LED_BUILTIN;
 
 int status = WL_IDLE_STATUS;
 
+#if defined(ARDUINO_ARCH_ZEPHYR)
+ZephyrServer wifiServer(502);
+#else
 WiFiServer wifiServer(502);
+#endif
 
 ModbusTCPServer modbusTCPServer;
 
@@ -74,8 +83,12 @@ void setup() {
 
 void loop() {
   // listen for incoming clients
+#if defined(ARDUINO_ARCH_ZEPHYR)
+  WiFiClient client = wifiServer.accept();
+#else
   WiFiClient client = wifiServer.available();
-
+#endif
+
   if (client) {
     // a new client connected
     Serial.println("new client");

library.properties

@@ -6,6 +6,6 @@ sentence=Use Modbus equipment with your Arduino.
 paragraph=Using TCP or RS485 shields, like the MKR 485 Shield. This library depends on the ArduinoRS485 library.
 category=Communication
 url=https://www.arduino.cc/en/ArduinoModbus/ArduinoModbus
-architectures=megaavr,samd,mbed_nano,mbed_portenta,mbed_opta
+architectures=megaavr,samd,mbed_nano,mbed_portenta,mbed_opta,zephyr,zephyr_main,zephyr_contrib
 includes=ArduinoModbus.h
 depends=ArduinoRS485

src/ModbusClient.cpp

@@ -411,7 +411,7 @@ const char* ModbusClient::lastError()
     return NULL;
   }
 
-  return modbus_strerror(errno); 
+  return modbus_strerror(errno);
 }
 
 void ModbusClient::setTimeout(unsigned long ms)

src/libmodbus/modbus-private.h

@@ -20,6 +20,7 @@ struct timeval {
     uint32_t tv_usec;
 };
 #else
+# include <sys/select.h>
 # include <sys/time.h>
 #endif
 #else

src/libmodbus/modbus.c

@@ -25,6 +25,7 @@
 #ifndef DEBUG
 #define printf(...) {}
 #define fprintf(...) {}
+#define vfprintf(...) {}
 #endif
 #endif